This triple line graph aims to correlate types of borders to their situation (page number), page location and to the density of advertisements on each page in our usual samples of the newspaper Shenbao (Jan 7, 1914 ; Jan 3, 1924 ; Jan 5, 1934 ; Feb 1, 1941 ; Jan 1, 1949). The blue line stands for border types, the red line for page density and the grey line for page location. The "X" axis indicates page numbers. The "Y" axis measures either the type of border (0 for open space, 1 for boundary, 2 for border), the density of advertisements on each page (from 0 : < 5 ads/page; 1: between 5 and 10 ads; 2 : > 10 ads/page) or the page location (0 for maginal, 1 for central).
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